Applied Catalysis A: General最新文献

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Enhanced stability and activity in the upgrading ethanol to n-butanol using a ruthenium polyphenylene catalyst
IF 4.7 2区 化学
Applied Catalysis A: General Pub Date : 2025-01-27 DOI: 10.1016/j.apcata.2025.120139
Xuetong Pei , Mengyao Su , Christopher Waldron , Marc Walker , Donato Decarolis , Qian He , Stuart Archer , Martin B. Smith , Sandra E. Dann , Simon A. Kondrat
{"title":"Enhanced stability and activity in the upgrading ethanol to n-butanol using a ruthenium polyphenylene catalyst","authors":"Xuetong Pei ,&nbsp;Mengyao Su ,&nbsp;Christopher Waldron ,&nbsp;Marc Walker ,&nbsp;Donato Decarolis ,&nbsp;Qian He ,&nbsp;Stuart Archer ,&nbsp;Martin B. Smith ,&nbsp;Sandra E. Dann ,&nbsp;Simon A. Kondrat","doi":"10.1016/j.apcata.2025.120139","DOIUrl":"10.1016/j.apcata.2025.120139","url":null,"abstract":"<div><div>Bioethanol upgrading to n-butanol is catalysed by homogeneous catalysts under mild solventless liquid phase conditions, at which heterogeneous catalysts have poor performance. Here a heterogeneous catalyst, initially comprised of a Ru(bipy) complex incorporated into a polyphenylene support, gave a catalytic performance (TON of 3565 Ru<sup>−1</sup> and 82 % n-butanol selectivity) that exceeded contemporary homogeneous and heterogeneous catalysts. Catalyst deactivation by water byproduct inhibition was improved by removal of water, via recharging the reactor with fresh ethanol, or by the co-addition of molecular sieve. The Ru polyphenylene catalyst showed greater stability in the presence of molecular sieve compared to the homogeneous catalyst, enabling high butanol yields. Characterisation showed a structural transformation of the single atom Ru(bipy) into 2.6 nm Ru(0) nanoparticles after 16 h reaction. While the Ru(0) had moderate recyclability (TON of 1000 Ru<sup>−1</sup>) the initial highly active species seen in the fresh catalyst are not stable.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"694 ","pages":"Article 120139"},"PeriodicalIF":4.7,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143162743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Optimizing CuNi catalysts for long-term vapor phase hydrogenation of levulinic acid to γ-valerolactone: Influence of the support on activity and stability
IF 4.7 2区 化学
Applied Catalysis A: General Pub Date : 2025-01-27 DOI: 10.1016/j.apcata.2025.120140
Eliana Quiroga , Bernay Cifuentes , Santiago Yara , Julia Moltó , Martha Cobo
{"title":"Optimizing CuNi catalysts for long-term vapor phase hydrogenation of levulinic acid to γ-valerolactone: Influence of the support on activity and stability","authors":"Eliana Quiroga ,&nbsp;Bernay Cifuentes ,&nbsp;Santiago Yara ,&nbsp;Julia Moltó ,&nbsp;Martha Cobo","doi":"10.1016/j.apcata.2025.120140","DOIUrl":"10.1016/j.apcata.2025.120140","url":null,"abstract":"<div><div>The conversion of biomass-derived levulinic acid (LA) to γ-valerolactone (GVL) is crucial for sustainable chemical and fuel production. This study evaluates the vapor phase hydrogenation of LA using Cu-Ni bimetallic catalysts supported on various metal oxides and their impact on the pathways of LA conversion. Specifically, we examine the influence of AlO<sub>2</sub>, SiO<sub>2</sub>, ZrO<sub>2</sub>-SiO<sub>2</sub>, and CeO<sub>2</sub>-SiO<sub>2</sub> on catalyst performance and stability. Cu-Ni catalysts supported on SiO<sub>2</sub> modified with citric acid (SiO<sub>2-CA</sub>) exhibited superior stability, while the one supported on Al<sub>2</sub>O<sub>3</sub> showed higher activity. The enhanced performance of the SiO<sub>2-CA</sub>-supported catalyst is attributed to its moderate acidity (379.3 µmol/g<sub>cat</sub>) and resistance to sintering. Stability tests reveal that although both CuNi/Al<sub>2</sub>O<sub>3</sub> and CuNi/SiO<sub>2-CA</sub> catalysts deactivate over time, the latter demonstrates slower deactivation and better reactivation potential, maintaining conversion close to 80 % for 42 h. The study highlights the role of support in optimizing catalytic performance for LA hydrogenation.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"694 ","pages":"Article 120140"},"PeriodicalIF":4.7,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143163856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Transalkylation between C10 aromatics and 2-methylnaphthalene to synthesize 2,6-dimethylnaphthalene by Mo-modified HZSM-12 catalysts
IF 4.7 2区 化学
Applied Catalysis A: General Pub Date : 2025-01-27 DOI: 10.1016/j.apcata.2025.120138
Cheng Xiong , Shuai Meng , Runping Ye , Huibing Shi , Deming Zhao , Rongbin Zhang , Gang Feng
{"title":"Transalkylation between C10 aromatics and 2-methylnaphthalene to synthesize 2,6-dimethylnaphthalene by Mo-modified HZSM-12 catalysts","authors":"Cheng Xiong ,&nbsp;Shuai Meng ,&nbsp;Runping Ye ,&nbsp;Huibing Shi ,&nbsp;Deming Zhao ,&nbsp;Rongbin Zhang ,&nbsp;Gang Feng","doi":"10.1016/j.apcata.2025.120138","DOIUrl":"10.1016/j.apcata.2025.120138","url":null,"abstract":"<div><div>Zeolites are important catalysts for the synthesis of 2,6-dimethylnaphthalene (2,6-DMN) by the raw materials of 2-methylnaphthalene (2-MN) and C<sub>10</sub> aromatics. However, the selectivity of 2,6-DMN is still difficult to control and the catalysts often suffer from poor hydrothermal stability. In this work, a series of Mo-modified HZSM-12 catalysts were prepared and investigated for the transalkylation reaction between 2-MN and C<sub>10</sub> aromatics under a hydrogen atmosphere. The introduction of Mo binds to the B-acid sites on the molecular sieves, modulating the B-acid strength and content of the catalysts while also altering their pore structure. As a result, the 3 %Mo/HZSM-12 catalyst exhibited excellent catalytic performance, the conversion of 2-MN could still reach up to 61.3 % and the ratio of 2,6-/2,7-DMN was able to reach 1.69 after 6 h of the reaction. Therefore, our work is expected to provide a useful strategy for constructing efficient zeolite catalysts for the synthesis of high-value esters’ precursors.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"693 ","pages":"Article 120138"},"PeriodicalIF":4.7,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143099877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Strong interaction effects of non-noble metal oxide Co2SiO4/Mn0.5Cd0.5S Schottky junctions enhance photocatalytic hydrogen evolution
IF 4.7 2区 化学
Applied Catalysis A: General Pub Date : 2025-01-27 DOI: 10.1016/j.apcata.2025.120142
Fei Jin , Peizhen Wang , Zhiliang Jin
{"title":"Strong interaction effects of non-noble metal oxide Co2SiO4/Mn0.5Cd0.5S Schottky junctions enhance photocatalytic hydrogen evolution","authors":"Fei Jin ,&nbsp;Peizhen Wang ,&nbsp;Zhiliang Jin","doi":"10.1016/j.apcata.2025.120142","DOIUrl":"10.1016/j.apcata.2025.120142","url":null,"abstract":"<div><div>Precious metal particles are widely used as co-catalysts due to their exceptional photocatalytic properties. However, their high cost and limited availability underscore the urgent need to develop efficient and cost-effective non-precious metal alternatives. In this study, Co<sub>2</sub>SiO<sub>4</sub>/Mn<sub>0.5</sub>Cd<sub>0.5</sub>S was synthesized using Co<sub>2</sub>SiO<sub>4</sub> as co-catalyst. When the Co<sub>2</sub>SiO<sub>4</sub> content was optimized to 15 %, the hydrogen evolution activity reached 11.20 mmol·g⁻¹ ·h⁻¹ , representing a 12-fold enhancement compared to Mn<sub>0.5</sub>Cd<sub>0.5</sub>S alone. In addition, Co<sub>2</sub>SiO<sub>4</sub> significantly enhanced the hydrogen production capability of Mn<sub>0.5</sub>Cd<sub>0.5</sub>S, outperforming traditional co-catalysts such as Pt and Au. In situ XPS and DFT calculations revealed that the strong electron coupling between Co<sub>2</sub>SiO<sub>4</sub> and Mn<sub>0.5</sub>Cd<sub>0.5</sub>S forms a Schottky junction. This structure facilitates the unidirectional transfer of photoexcited electrons from Mn<sub>0.5</sub>Cd<sub>0.5</sub>S to Co<sub>2</sub>SiO<sub>4</sub> while effectively suppressing electron backflow via the Schottky barrier. This study provides a comprehensive understanding of Schottky junctions and offers valuable insights into the development of non-precious metal-based co-catalysts for hydrogen production.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"693 ","pages":"Article 120142"},"PeriodicalIF":4.7,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143099875","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Gold-decorated Pt bimetallic nanoparticles on sulfur vacancy-rich MoS2 for aqueous phase reforming of methanol into hydrogen at low temperature and atmospheric pressure
IF 4.7 2区 化学
Applied Catalysis A: General Pub Date : 2025-01-26 DOI: 10.1016/j.apcata.2025.120137
Kaicheng Qian , Yuezhou Li , Yupeng Lou , Tong Wei , Xiaoqing Yan , Hisayoshi Kobayashi , Dongming Qi , Mingwu Tan , Renhong Li
{"title":"Gold-decorated Pt bimetallic nanoparticles on sulfur vacancy-rich MoS2 for aqueous phase reforming of methanol into hydrogen at low temperature and atmospheric pressure","authors":"Kaicheng Qian ,&nbsp;Yuezhou Li ,&nbsp;Yupeng Lou ,&nbsp;Tong Wei ,&nbsp;Xiaoqing Yan ,&nbsp;Hisayoshi Kobayashi ,&nbsp;Dongming Qi ,&nbsp;Mingwu Tan ,&nbsp;Renhong Li","doi":"10.1016/j.apcata.2025.120137","DOIUrl":"10.1016/j.apcata.2025.120137","url":null,"abstract":"<div><div>Aqueous phase reforming of methanol (APRM) into H<sub>2</sub> at low temperature is a sustainable methodology to the efficient generation and safe storage of hydrogen. Herein, we demonstrate that Pt-Au bimetallic nanoparticles supported on sulfur vacancy (S<sub>v</sub>)-controllable MoS<sub>2</sub> nanosheets (Pt-Au/MoS<sub>2</sub>-<em>T</em>H) enable high-efficiency H<sub>2</sub> production via APRM at 70 °C and atmospheric pressure. The Au species modifies the valence electron environment of neighboring Pt and functions as a “pump” to drive the electron migration from Pt to MoS<sub>2</sub>. Meanwhile, the S<sub>v</sub> created by H<sub>2</sub> thermal reduction acts as the “electrons reservoir” to increase the electron density at the valence band top of MoS<sub>2</sub>, thus forming S<sub>v</sub>-rich Pt<sup>δ+</sup>Au−S<sub>v</sub>−Mo<sup>&lt;4+</sup> interface sites. Mechanistic investigations elucidate that the Pt<sup>δ+</sup>Au−S<sub>v</sub> and S<sub>v</sub>−Mo<sup>&lt;4+</sup> sites are responsible for cleaving C−H and O−H bonds in CH<sub>3</sub>OH and HO−HCHO−H, respectively, accounting for the significantly enhanced catalytic performance. The optimal Pt-Au/MoS<sub>2</sub>-500H catalyst with the most S<sub>v</sub> and the strongest electronic interaction, exhibits an APRM TOF up to 10.9 h<sup>−1</sup>, surpassing the Pt-Au/MoS<sub>2</sub>-500N calcined under N<sub>2</sub> by 12 times and Pt/MoS<sub>2</sub>-500H by 34 times. This discovery not only presents a promising avenue for versatile H<sub>2</sub> utilization via APRM, but holds potential for a variety of hydrogen-involved energy and environmental applications.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"693 ","pages":"Article 120137"},"PeriodicalIF":4.7,"publicationDate":"2025-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143099872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhancing aldol condensation with coupling oxygen storage materials and VPO catalysts: Impact of oxygen, kinetics and mechanism
IF 4.7 2区 化学
Applied Catalysis A: General Pub Date : 2025-01-26 DOI: 10.1016/j.apcata.2025.120136
Yuxia Li , Tingting Ge , Zehao Jing , Hui Guo , Yanxia Zheng , Yuchao Li , Xinpeng Guo , Haofei Huang , Cuncun Zuo
{"title":"Enhancing aldol condensation with coupling oxygen storage materials and VPO catalysts: Impact of oxygen, kinetics and mechanism","authors":"Yuxia Li ,&nbsp;Tingting Ge ,&nbsp;Zehao Jing ,&nbsp;Hui Guo ,&nbsp;Yanxia Zheng ,&nbsp;Yuchao Li ,&nbsp;Xinpeng Guo ,&nbsp;Haofei Huang ,&nbsp;Cuncun Zuo","doi":"10.1016/j.apcata.2025.120136","DOIUrl":"10.1016/j.apcata.2025.120136","url":null,"abstract":"<div><div>Supported vanadium-phosphorus oxide (VPO) bilayer composite catalysts were prepared using oxygen storage compounds (CeO<sub>2</sub>, ZrO<sub>2</sub>, TiO<sub>2</sub>, and other forms) as catalyst supports, and applied to the aldol condensation of acetic acid and formaldehyde to produce acrylic acid. The active oxygen species on the crystal surface of rod-shaped CeO<sub>2</sub> (VPO/CeO<sub>2</sub>-r) catalyst loaded with VPO effectively suppress catalyst carbon deposition and deactivation. CeO<sub>2</sub>-r had good oxygen storage and oxygen transfer capabilities. The surface microstructure, catalytic performance, and oxygen vacancies were characterized by SEM, XRD, FI-IR, BET, TG, and EPR methods. The influence of catalytic support and reaction conditions was interrelated in an oxygen-containing atmosphere. RSM experimental design was performed and fitted to the kinetic. Under the optimal reaction conditions, using 40 % VPO/CeO<sub>2</sub>-r, O<sub>2</sub> flow rate of 6 mL/min, the yield of acrylic acid was 72.6 %, and there was no carbon deposition or deactivation after the operation cycle.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"693 ","pages":"Article 120136"},"PeriodicalIF":4.7,"publicationDate":"2025-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143099874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Ultrasonic-assistance influence on the impregnation method for high metal loading CoMo/Ti-HMS catalysts
IF 4.7 2区 化学
Applied Catalysis A: General Pub Date : 2025-01-25 DOI: 10.1016/j.apcata.2025.120135
T.A. Zepeda
{"title":"Ultrasonic-assistance influence on the impregnation method for high metal loading CoMo/Ti-HMS catalysts","authors":"T.A. Zepeda","doi":"10.1016/j.apcata.2025.120135","DOIUrl":"10.1016/j.apcata.2025.120135","url":null,"abstract":"<div><div>Here, it reports the influence of ultrasonic assistance during the impregnation process using traditional precursor salts of cobalt nitrate, molybdenum heptamolybdate, and citric acid as a chelating agent. The variation in metal loading (CoO + MoO<sub>3</sub>) from 16.1 wt% (12.7 wt% MoO<sub>3</sub>, 3.4 wt% CoO) to 46.8 wt% (35.7 wt% MoO<sub>3</sub>, 10.1 wt% CoO) was evaluated in the HDS of DBT. Ultrasonically-assisted impregnation demonstrated improved metal dispersion, improved the Co-Mo interactions and complete sulfidation of cobalt species, and enhanced the formation of well-dispersed CoMoS phase, unlike traditional impregnation catalysts that even exhibited non-sulfided Co species. Catalysts prepared using ultrasonic assistance exhibited a higher initial reaction rate for the HDS of DBT than their traditionally impregnated counterparts. Although the direct desulfurization pathway was the primary reaction route, the ultrasonic<strong>-</strong>assisted catalysts exhibited higher selectivity toward the hydrogenation pathway (higher HYD/DDS ratios), especially at higher metal loadings. The increased surface acidity, which correlated with rising metal content, enhanced the hydrogenation pathway during the HDS of DBT. Despite the superior catalytic performance of ultrasonic-assisted catalysts, the effectiveness of increasing metal content decreases at higher metal loadings, likely due to limitations in active site dispersion on the surface.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"693 ","pages":"Article 120135"},"PeriodicalIF":4.7,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143099876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Exploring Mg-Sn alloys as electrocatalysts for CO2 electroreduction
IF 4.7 2区 化学
Applied Catalysis A: General Pub Date : 2025-01-25 DOI: 10.1016/j.apcata.2024.120050
Neus Sunyer-Pons , Vlastimil Mazanek , Zdeněk Sofer , Bahareh Khezri , Katherine Villa , Jose Ramon Galan-Mascaros
{"title":"Exploring Mg-Sn alloys as electrocatalysts for CO2 electroreduction","authors":"Neus Sunyer-Pons ,&nbsp;Vlastimil Mazanek ,&nbsp;Zdeněk Sofer ,&nbsp;Bahareh Khezri ,&nbsp;Katherine Villa ,&nbsp;Jose Ramon Galan-Mascaros","doi":"10.1016/j.apcata.2024.120050","DOIUrl":"10.1016/j.apcata.2024.120050","url":null,"abstract":"<div><div>Tin is one of the most selective electrocatalysts for CO<sub>2</sub> reduction (CO2RR), mostly thanks to its poor activity towards the hydrogen evolution reaction (HER). Still, Sn electrodes are limited by their very high overpotential. We decided to investigate the electrochemical CO2RR catalytic activity of tin-magnesium alloys that can be easily obtained by thermal annealing from the elemental metallic powders. We found that the alloys exhibit a slightly improved activity and selectivity towards CO2RR with formate as dominant product according to electrochemical and chemical analysis. Post-mortem characterization confirmed that this effect is not due to the alloys performance, but to Sn re-structuration. Most of the Mg is leached from the alloy into the electrolyte during CO2RR, leaving a highly porous Sn structure. These changes in morphology and surface area as triggered by Mg leaching, appear to be at the origin of the enhanced electrocatalytic performance.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"690 ","pages":"Article 120050"},"PeriodicalIF":4.7,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143147604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Sustainable synthesis of heterocyclic fragrances via cycloaddition of 1,8-cineole and 1,4-cineole to aldehydes catalyzed by heteropoly acid
IF 4.7 2区 化学
Applied Catalysis A: General Pub Date : 2025-01-25 DOI: 10.1016/j.apcata.2025.120133
Núbia L. Lataliza-Carvalho , Izadora M. Costa , Kelly A. da Silva Rocha , Elena F. Kozhevnikova , Ivan V. Kozhevnikov , Elena V. Gusevskaya
{"title":"Sustainable synthesis of heterocyclic fragrances via cycloaddition of 1,8-cineole and 1,4-cineole to aldehydes catalyzed by heteropoly acid","authors":"Núbia L. Lataliza-Carvalho ,&nbsp;Izadora M. Costa ,&nbsp;Kelly A. da Silva Rocha ,&nbsp;Elena F. Kozhevnikova ,&nbsp;Ivan V. Kozhevnikov ,&nbsp;Elena V. Gusevskaya","doi":"10.1016/j.apcata.2025.120133","DOIUrl":"10.1016/j.apcata.2025.120133","url":null,"abstract":"<div><div>1,8-cineole, also known as eucalyptol, is the main component of eucalyptus oils (75–90 %) and many other essential oils. The present work developed a novel synthesis of potentially valuable fragrant heterocyclic oxabicyclo[3.3.1]nonene compounds from bio-renewable 1,8-cineole and its structural isomer 1,4-cineole via their cycloaddition to aldehydes, such as benzaldehyde and <em>trans-</em>cinnamaldehyde, in the presence of silica-supported tungstophosphoric heteropoly acid H<sub>3</sub>PW<sub>12</sub>O<sub>40</sub> (HPW) or its acidic salt Cs<sub>0.5</sub>H<sub>0.5</sub>PW<sub>12</sub>O<sub>40</sub> (CsPW) as solid acid catalysts. The reaction of 1,8-cineole with phenylacetaldehyde, in addition to the oxabicyclo[3.3.1]nonene, gave the Friedel-Crafts alkylation product with a fused tetracyclic structure. The same products were obtained starting from styrene oxide through a consecutive tandem process involving the acid-catalyzed isomerization of styrene oxide to phenylacetaldehyde followed by its cycloaddition to 1,8-cineole. The process can be performed in various green solvents under mild conditions without catalyst leaching, with the best yields obtained in dimethyl carbonate.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"693 ","pages":"Article 120133"},"PeriodicalIF":4.7,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143099871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Tailored Co/SBA-15 catalyst for highly efficient hydrodeoxygenation of 5-hydroxymethylfurfural to 2,5-dimethylfuran
IF 4.7 2区 化学
Applied Catalysis A: General Pub Date : 2025-01-25 DOI: 10.1016/j.apcata.2025.120134
Ting Wu, Xiang Zhang, Hongju Liang, Quan Wang, Chun-Ling Liu, Wen-Sheng Dong
{"title":"Tailored Co/SBA-15 catalyst for highly efficient hydrodeoxygenation of 5-hydroxymethylfurfural to 2,5-dimethylfuran","authors":"Ting Wu,&nbsp;Xiang Zhang,&nbsp;Hongju Liang,&nbsp;Quan Wang,&nbsp;Chun-Ling Liu,&nbsp;Wen-Sheng Dong","doi":"10.1016/j.apcata.2025.120134","DOIUrl":"10.1016/j.apcata.2025.120134","url":null,"abstract":"<div><div>The design of highly efficient and cost-effective catalysts for the conversion of biomass-derived 5-hydroxymethylfurfural (5-HMF) into sustainable liquid fuel 2,5-dimethylfuran (DMF) is both important and challenging. In this study, we developed a non-noble Co catalyst supported on SBA-15 (25Co/SBA-15). Our results demonstrate that this catalyst exhibits remarkable efficiency in selectively hydrodeoxygenating 5-HMF to DMF, achieving a DMF yield of 96.3 % with complete conversion of 5-HMF under mild reaction conditions (150 °C, 2.0 MPa H<sub>2</sub> for 2 h). Notably, the productivity rate of DMF reached an exceptional value of 19.1 mmol·gcat<sup>−1</sup>·h<sup>−1</sup>, surpassing most previously reported catalysts in literature. Additionally, by utilizing two distinct solvents - N,N-dimethylformamide (N,N-DMF) resulting in a high yield of 2,5-bis(hydroxymethyl)furan (BHMF) and tetrahydrofuran (THF) yielding an even higher yield of DMF - our approach enables facile switching between these two products during hydrogenation over the Co/SBA-15 catalyst. Furthermore, our catalyst demonstrates excellent reusability and can be easily regenerated through calcination in air. The exceptional catalytic performance of the catalyst can be ascribed to the synergistic effect between metallic Co and adjacent Lewis acidic Co<sup>2+</sup> in CoO dispersed on the surface of SBA-15. A dual-site Langmuir–Hinshelwood–Hougen–Watson (LHHW) model was proposed for the hydrodeoxygenating 5-HMF to DMF.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"693 ","pages":"Article 120134"},"PeriodicalIF":4.7,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143099870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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